The National Stock Exchange of India Limited or S&P CNX NIFTY (NSE), is a Mumbai-based stock exchange. It is the largest stock exchange in India in terms of daily turnover and number of trades, for both equities and derivative trading.[1]. Though a number of other exchanges exist, NSE and the Bombay Stock Exchange are the two most significant stock exchanges in India, and between them are responsible for the vast majority of share transactions. The NSE's key index is the S&P CNX Nifty, known as the Nifty, an index of fifty major stocks weighted by market capitalisation.

NSE is mutually-owned by a set of leading financial institutions, banks, insurance companies and other financial intermediaries in India but its ownership and management operate as separate entities[2]. As of 2006, the NSE VSAT terminals, 2799 in total, cover more than 1500 cities across India [3]. In October 2007, the equity market capitalization of the companies listed on the NSE was US$ 1.46 trillion, making it the second largest stock exchange in South Asia. NSE is the third largest Stock Exchange in the world in terms of the number of trades in equities.[4]It is the second fastest growing stock exchange in the world with a recorded growth of 16.6%.[5]